Darby Township is a township in Delaware County, Pennsylvania, United States. The population was 9,264 as of the 2010 census. It is home to both residential areas and expansive industrial districts. Darby Township is home to a diverse population and its industrial districts are popular among shipping companies for their proximity to Philadelphia International Airport. It also is known for being made up of two non-contiguous geographical areas, requiring one to pass through at least two neighboring municipalities to make it from one end of Darby Township to the other. Darby Township is a distinct municipality from the nearby and similarly named Darby Borough and Upper Darby Township.

Delaware County, colloquially referred to as Delco, is a county in the Commonwealth of Pennsylvania. With a population of 576,830 as of the 2020 census, it is the fifth-most populous county in Pennsylvania and the third-smallest in area. The county was created on September 26, 1789, from part of Chester County and named for the Delaware River. The county is part of the Southeast Pennsylvania region of the state.